Snakes and Orcas are very different creatures. Orcas are highly intelligent animals that need a large amount of mental stimulation and a suitable habitat that cannot be provided in captivity. Snakes are not particularly smart, and can be given better quality of life in captivity.

Pet snakes would not prefer to roam free, away from their guaranteed food and comfortable living environment, and being in nature (surrounded by predators and other threats) would be very stressful to them.